21503055504322 has 16 divisors (see below), whose sum is σ = 36862580269440. Its totient is φ = 9215545364928.

The previous prime is 21503055504257. The next prime is 21503055504401. The reversal of 21503055504322 is 22340555030512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411318 + ... + 6708049.

It is an arithmetic number, because the mean of its divisors is an integer number (2303911266840).

Almost surely, 2^{21503055504322} is an apocalyptic number.

21503055504322 is a deficient number, since it is larger than the sum of its proper divisors (15359524765118).

21503055504322 is a wasteful number, since it uses less digits than its factorization.

21503055504322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308545.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 21503055504322 in words is "twenty-one trillion, five hundred three billion, fifty-five million, five hundred four thousand, three hundred twenty-two".